Dinsmgbe austin



D. AUSTIN'.

" Whietree.

Patented' Feb. l1, 1868.'

4'I O ALL WHOMVIT MAY OONERN:

nINsMonE AUSTIN, os UNDERH'ILn-VERMONT, AssIeNoR To HIMsnLrAND HoMERAnAwsoN.

Letters Patent No. 74,273, 'dated February 11, 1868.`

IMPROVEMENT Y IN WHIliliLE-'llRE'E.V

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Be it' known that I, DINSMORE AUSTIN, of Underhill, (assigner :to myself and Homer Rawson, of`Jericho,)

.in the county. of Chittenden, and in the State of Vermont, have invented certain new and useful Improvements p lin Whifiie-Trees; and do hereby declare that the following is a full, clear, and exact description thereof, reference being hadfto the accompanying drawings, and the'letters'of vreference marked thereon.

-The annexed drawings, making a part 4ot' this specification,represent a horizontal section of a swingle-tree,

which is madein two principal parts, the front part represented 'by A, and the back part by B. The front part,`

A, is made of wood, and has-a cylindrical groove cut into and extending the entire length of its back side, into 4whiehare adjustedlhespiral springs, c c, made fast atone end by the shoulder g, and is also bevelled toward the p front, near the ends, and provided with the lip o, to fit into the groove o of the back part, Bi, The back part i ofthe swingle-tre'e,`]3, is ordinarily made of. malleable iron, and enough longer than the part A thatthe anges at each end, with which vit is provided, may embrace, and the groove o' exactly t over the lip o of the front part., A, and of such shape'as to ft the back side of the front, A, to which it is screwed. It is also provided with slots, L and Z. A pin or tug, a, is inserted through the hole in the end of the part B, which is made to correspond With the groove in the back side of the part A, until it reaches and presses ou the end ofthe spring c, vrhere itis kept from slipping out, and is worked. backward and forward by the staple or loop e, driven into it, and which works in the slot l'.

C represents a steel or other spring, attached to the boek of the swingle-trce, by a clasp or staple, f, in which it slides, and'is provided with a, shoulder, x, at oneend, and ilangpe t' at the other. The shoulder :v passes through the part B, behind the coiled spring and works in the slot Z, and thelange i clasps and securely :holds the tra-ce, Z1, against the end ofthe swinglc-tree, and over the pin a.

The cord D, which is attached at one*end to the pin a, by means of therloop or staple e, and run through the loop -or pulley e', and thence to a carriage, or wherever desired, is-designed to pull the pin 'a .back or out of the trace b, by means of the staple e, working in the sloth, and the horse or other animal'thereby detached from the carriage. I

The `steelspr'ing C, which holds the trace b in place, by means of the flange .2', may be pulled or sprung backward, or pulled out laterally, by means of` the spring c, which rests against the shoulder z, so as to either slip the trace b over the'pin a, or 0E et' the same,`and thereby attach to or detach the trace from the swngle-tree.

Having thus fullydescribed my invention, what I claim as new, and desire to secure hy Letters Patent, is-

1. The movable pin a, in combination with the spiral spring c, when used as and for the purpose specied.

2. The springC, provided with a flange, z', and shoulder in combination with the spiral spring` c, when used as and for the purpose set forth. Y

In testimony that I claim the foregoing, I have hereunto set my hand, this 5th day of December, 1.867. DINSMORE AUSTIN.

Witnesses:

J. H. Curr, lCiencia F. 'CMPP' 

